Experimental Study on Mechanical Properties of Deep Buried Granite under Different Confining Pressures

Table 6

Poisson’s ratio of hysteresis loops under various confining pressures.

Category of confining pressure (MPa)	Poisson’s ratio (10^−2)
	Hysteresis loop 1	Hysteresis loop 2	Hysteresis loop 3	Hysteresis loop 4	Hysteresis loop 5	Average
0	17.3	19.8	21.1	22.6	23.2	21.0
15	29.1	30.2	30.1	29.5	31.2	28.6
35	41.3	42.0	44.3	44.6	44.3	42.3
45	29.1	29.2	29.1	28.1	27.9	26.5
55	21.3	21.3	21.5	21.3	21.6	21.3